There is a lot more to servicing a truck than just oil and filters. A big part of it is checking everything out as you go. Some items may not need to be checked on every service- like kingpins or shackle bushes as these are slow wearing parts.
Looking at your springs a common breakage point is at the eye
Check along the spring leaves for cracks
Check the U Bolts
I like to tap everything with a hammer to check if it is tight. You can just visually check or put a spanner (wrench) on it.
There is a sound difference between a tight nut and a loose one. Try it yourself, loosen off a nut and tap it then tap one that's tight. You will be able to hear a distinct difference in sound.
1.28- Check the kingpin by jacking the wheel off the ground and using a bar give it a wiggle- what you are looking for is excessive movement
This will also check the wheel bearing play, If you want to eliminate the wheel bearing play while checking the kingpin have someone put their foot on the brake and repeat the process.
Spin the wheel and listen to the wheel bearing it should sound smooth, it shouldn't have a rumbling sound
Check your shock absorbers for fluid leaks, give it a twist to check the bushes
You will need a helper to check the steering joints. Have them rock the steering wheel from sided to side while you inspect. What you are looking for is movement in the joint, one part of the joint moving before the other. The allowable movement is 2mm but if you have that amount of movement that steering joint is in serious trouble.
2:49- To check the shackle bushes sometimes you can put a bar in and be able to feel the movement, other times you need to put a jack in between the spring and the chassis to take the weight then put a bar in. If you cant get a bar in between the spring and the chassis you can put a jack between the ground and the chassis.
Check bell housing bolts are tight, visually inspect the engine mounts/ gearbox mounts. Check the uni joints by pushing, pulling and twisting it.
3.50- Check the uni joint bolts
Same with centre bearing push it up and down to check for movement
If the truck has a body on it, how ever they have secured it to the chassis check that it is secure. This can be a common point for coming loose.
Check the cross member bolts to chassis
The cross members can crack in the corners so keep an eye out for that
Check air lines for rubbing and chaffing, its much better to find it now before it rubs a hole and blows a hose, also listen for air leaks
Check the torque rod bushes
4:53- When airbags get old they start to crack and leak slightly. Look in the cracks if you can see cord/ fabric it is time to replace it before you have a blow out.
A quick way to check your brake adjustment is to look at the travel of the brake booster rod. You can see where its been sitting with the brakes released and where it is sitting with the brakes applied. A general rule is 45mm travel for the back brakes (Type 30 booster) 38mm travel for the front brakes
5:37- I use a zip tie and mark the 5mm and 10mm points then put this up against the brake lining. 3-4mm is the general minimum allowable lining thickness before the brakes need replacing
Make sure if the drum has a lip you are getting inside it to get an accurate reading
Look at the linings for oil contamination this will indicate a leaking wheel seal
For our above walk around you want to check all your lights. For the reverse light you might have to have the truck running put it in reverse, switch it off, then turn the key back on.
I use a combination of extension bars and sockets to jam between the steering wheel and the brake pedal
Now you can check your brake rod travel on brakes that only have a service side not a park brake. Also listen for any air leaks.
Use a tire pressure gauge or quick check your tires listening for the different sound. Use a torque wrench to check your wheel nuts or use the tap method as a quick check. Check your fuel tank for leaks and that the mounting is secure